---
title: "Nikon D40 Battery — $108K/yr Amazon US Niche (2026) - Flapen"
canonical_url: "https://flapen.com/research/us/electronics/nikon-d40-battery"
last_updated: "2026-08-11T00:59:42.342Z"
locale: en
meta:
description: "Niche score 49/100 · $108K/yr market · 33K searches/yr · $21.79 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:description": "Niche score 49/100 · $108K/yr market · 33K searches/yr · $21.79 avg price. Doesn't clear our bar today. Data updated Jul 2026."
"og:title": "Nikon D40 Battery — $108K/yr Amazon US Niche (2026) - Flapen"
---
# **nikon d40 battery**
**Skip it**
A concentrated shelf (top 5 take 80% of clicks) — this niche doesn't clear our bar today.
Market size 26Growth 41Conversion 97Competition 17Returns 85Price range 84Avg price 92Brand share 21Review moat 84Quality gap 33
**Conversion**
**Incredible****14.8%**
search→purchase rate — share of searches ending in a sale
**Avg price**
**Great****$21.79**
avg listing price — sweet spot $15–$100
**Returns**
**Great****1.5%**
return rate — above 5% kills the launch gate
**Review moat**
**Great****318**
avg incumbent reviews — the moat a new listing must climb
**Price range**
**Great****$8.93–$53.48**
cheapest to priciest tracked listing — scored on the share inside $15–$100
**Growth**
**Okay****+12.8%**
90-day search growth — must beat 0% to launch
**Quality gap**
**Okay****4.5★**
avg incumbent rating — lower means beatable quality
**Market size**
**Okay****$108K**
$108K/yr · 33K searches
**Brand share**
**Bad****92%**
top-5 brand share — brand-locked demand
**Competition**
**Bad****80%**
top-5 click share — a locked-up shelf
**Signals**[** Low Review Barrier**](https://flapen.com/research/niches?market=us&signal=low_review_barrier "Top brand's reviews < 500")
According to Flapen's Amazon United States niche tracking, nikon d40 battery is a $108K/yr Amazon United States market (33K searches/yr). The top 5 brands hold 92% of demand. Verdict: Skip it — 49/100.
Data updated Jul 17, 2026 · scored weekly · [~~How we score niches ~~](https://flapen.com/research/methodology)
## **nikon d40 battery market data**
- **Units sold / yr**
- **4K–5K**
- avg 100–250/product
- **Revenue / yr**
- **$87K–$109K**
- units × avg price
- **Conversion rate**
- **14.8%**
- **Avg BSR**
- **#446**
- **Page quality**
- **0%**
- **Prime**
- **91%**
- **Sponsored**
- **73%**
- **Out of stock**
- **8.5%**
- **Avg brand age**
- **91 months**
- **Avg seller age**
- **199 days**
## **Competition & brand share**
The top 5 products capture 80% of clicks — a locked-up shelf that new listings rarely crack.
**Brands**
**8 **▼falling
**Sellers**
**15**
**Top-5 brand share**
**92%**
Top 20: 100%
**Top-5 click share**
**80%**
Top 20: 100%
**Open market**
**5%**
- FCDAZR38% - FirstPower22% - Kastar20% - LP8% - Batmax5% - SUGUBU4% - Open — no brand owns it (2 brands, 5%)
## **Demand & seasonality**
Weekly Amazon search volume, last 104 weeks — +12.8% search growth over the last 90 days.
900700Spike '25Spike '26 seasonSepDecMarJunAugNovMarMay
No pronounced peak months · busiest ÷ quietest = 1.5×
[**Open Trend **](https://flapen.com/research/us/electronics/nikon-d40-battery/trend)
## **Top nikon d40 battery search terms**
- **nikon d40 battery**9K/yr+27.3%12.9% conv. - **nikon d5000 battery**8K/yr-0.2%10.8% conv. - **nikon d3000 battery**8K/yr+10.5%12.6% conv. - **nikon d60 battery**6K/yr+17.4%11.9% conv. - **nikon lithium ion battery pack en-el9**3K/yr+5.7%15.2% conv. [**All search terms **](https://flapen.com/research/us/electronics/nikon-d40-battery/search-terms)
## **Top nikon d40 battery products on Amazon**
Each bubble is one product — market share against review moat; bubble size tracks estimated sales, color grades how beatable the incumbent looks.
0%10%$11K20%$22K30%$32K40%$43K101001K Reviews — right = deep review moatMarket share (90d) ≈ est. sales
Beatable (≤4.3★) Contested Strong incumbent (>4.7★)
All 11 tracked products in this niche — three views at once, no toggling.
### **Top sellers**
by 90-day click share
[1**FCDAZR EN-EL9 EN-EL9a Battery(2-Pack) and USB Dual Charger for Nikon D40 D40x D60 D3000 D5000 Cameras**FCDAZR**$20.99**4.7★58 rev](https://www.amazon.com/dp/B0G5Y8LDRP) [2**FirstPower EN-EL9 EN EL9a Battery 2-Pack 2000mAh and Dual USB Charger Compatible with Nikon D40 D40x D60 D3000 D5000 Digital SLR Cameras**FirstPower**$23.69**4.7★66 rev](https://www.amazon.com/dp/B0GG9WVXTW) [3**Kastar 2 Packs EN-EL9 Compatible Battery Replacement for Nikon EN-EL9 EN-EL9a EN-EL9e Batteries and Nikon D40 D40x D60 D5000 D3000 Cameras Nikon MH-23 Charger**Kastar**$13.75**4.4★653 rev](https://www.amazon.com/dp/B0016AQ930) [4**EN-EL9 EN EL9a Battery Pack LP 2-Pack 1050mAh Rechargeable Li-Ion Battery Set Compatible with Nikon D40 D40X D60 D3000 D5000 Cameras**LP**$20.67**4.5★374 rev](https://www.amazon.com/dp/B08T17H5ZM) [5**Kastar High Capacity EN-EL9 Replacement Lithium-Ion Battery for Nikon EN-EL9 EN-EL9a EN-EL9e Battery MH-23 Charger and Nikon D40 D40X D60 D3000 D5000 SLR Camera**Kastar**$8.93**4.6★235 rev](https://www.amazon.com/dp/B001YQ74FI)
**~~View all top sellers →~~**
### **Newest**
by launch date
[**FirstPower EN-EL9 EN EL9a Battery 2-Pack 2000mAh and Dual USB Charger Compatible with Nikon D40 D40x D60 D3000 D5000 Digital SLR Cameras**FirstPower**$23.69**66 rev6mo ago](https://www.amazon.com/dp/B0GG9WVXTW) [**FCDAZR EN-EL9 EN-EL9a Battery(2-Pack) and USB Dual Charger for Nikon D40 D40x D60 D3000 D5000 Cameras**FCDAZR**$20.99**58 rev7mo ago](https://www.amazon.com/dp/B0G5Y8LDRP) [**SUGUBU 2-Pack EN-EL9 Replacement Battery(2000mAh) and Rapid USB Dual Charger Compatible with Nikon EN-EL9 EN-EL9a D40 D40x D60 D3000 D5000 Digital SLR Cameras**SUGUBU**$22.44**22 rev11mo ago](https://www.amazon.com/dp/B0FLV8D5QL) [**EN-EL9 EN EL9a Battery Pack LP 2-Pack 1050mAh Rechargeable Li-Ion Battery Set Compatible with Nikon D40 D40X D60 D3000 D5000 Cameras**LP**$20.67**374 rev5y ago](https://www.amazon.com/dp/B08T17H5ZM) [**Kastar 1-Pack EN-EL9 Battery and AC Wall Charger Replacement for Nikon D5000 D40 D40X D60 D3000 SLR Digital Cameras**Kastar**$11.56**84 rev6y ago](https://www.amazon.com/dp/B08BNQ3ZR9)
**~~View all new products →~~**
### **Trending**
90-day click momentum
[**FCDAZR EN-EL9 EN-EL9a Battery(2-Pack) and USB Dual Charger for Nikon D40 D40x D60 D3000 D5000 Cameras**FCDAZR**$20.99**4.7★**▲ 122%**](https://www.amazon.com/dp/B0G5Y8LDRP) [**FirstPower EN-EL9 EN EL9a Battery 2-Pack 2000mAh and Dual USB Charger Compatible with Nikon D40 D40x D60 D3000 D5000 Digital SLR Cameras**FirstPower**$23.69**4.7★**▲ 107%**](https://www.amazon.com/dp/B0GG9WVXTW) [**SUGUBU 2-Pack EN-EL9 Replacement Battery(2000mAh) and Rapid USB Dual Charger Compatible with Nikon EN-EL9 EN-EL9a D40 D40x D60 D3000 D5000 Digital SLR Cameras**SUGUBU**$22.44**4.6★**▼ 14%**](https://www.amazon.com/dp/B0FLV8D5QL) [**Nikon EN-EL9 Rechargeable Li-ion Battery for Nikon D40 and D40x Digital SLR Cameras**Nikon**$53.48**4.2★**▼ 15%**](https://www.amazon.com/dp/B000KLZGGW) [**Kastar 2 Packs EN-EL9 Compatible Battery Replacement for Nikon EN-EL9 EN-EL9a EN-EL9e Batteries and Nikon D40 D40x D60 D5000 D3000 Cameras Nikon MH-23 Charger**Kastar**$13.75**4.4★**▼ 15%**](https://www.amazon.com/dp/B0016AQ930)
**~~View all trending →~~**
## **What buyers say about nikon d40 battery**
What buyers praise and complain about, mined from review topics.
### **What buyers love **
**Battery Life**26%
*“Solid batteries”*
**Charging**22%
*“Charging was quick”*
**Value For Money**11%
*“Good Value”*
**Advertised Vs Actual Product**9%
*“As advertised”*
**Compatibility-Overall**8%
*“it is compatible”*
**Size-Overall**5%
*“Fit perfect”*
**Quality-Overall**5%
*“The charger feels noticeably high quality”*
**Ease Of Use**2%
*“Its simple”*
**Lenses**2%
*“And yes, these cameras are still very capable, especially since they fit F mount lenses”*
**Durability**1%
*“The charger and batteries are well made and appear durable”*
### **What buyers complain about **
**Charging**28%
*“Batteries would not charge”*
**Battery Life**23%
*“my camera battery started to die”*
**Durability**8%
*“In fact it feels like it would easily crack if dropped”*
**Compatibility-Overall**6%
*“Dont work in D60”*
**Design-Overall**3%
*“Poor construction”*
**Value For Money**3%
*“for the cheap price it wasn't worth time”*
**Size-Overall**2%
*“Battery will only fit cameras listed in discription and newer Nikon D-3000 and D-5000 cameras”*
**Quality-Overall**2%
*“Overall, I was disappointed with the quality and expected better based on the product description”*
**Strength**1%
*“It is very flimsy feeling plastic with no weight to it”*
### **Top return reasons **
**Compatibility-Overall**26%
**Charging**18%
**Size-Overall**13%
**Camera Quality**12%
**Advertised Vs Actual Product**9%
**Battery Life**7%
**Value For Money**5%
**Functionality-Overall**2%
**Defective Material/Parts**2%
**Quality-Overall**1%
## **Common questions**
- **Is nikon d40 battery profitable to sell on Amazon United States?**
- The niche generates $108K/yr across 11 tracked products. 2 of 3 products launched in the last 360 days are still selling. 90-day search growth is +12.8%. Flapen's verdict: Skip it (49/100).
- **How competitive is the nikon d40 battery niche?**
- 8 brands and 15 sellers compete. The top 5 products take 80% of clicks and top 5 brands hold 92% of demand.
- **What do buyers complain about in nikon d40 battery?**
- Top complaints mined from reviews: Charging, Battery Life, Durability. The return rate is 1.5%.
- **When does demand for nikon d40 battery peak?**
- Demand is steady year-round — the busiest month runs 1.5× the quietest.
- **What does it cost to enter the nikon d40 battery niche?**
- Listings span $8.93–$53.48; the average listing price is $21.79 (sweet spot $15–$100). The average incumbent carries 318 reviews — the moat a new listing must climb.
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